1 /* Copyright (C) 2008-2019 Free Software Foundation, Inc. 2 3 This program is free software; you can redistribute it and/or modify 4 it under the terms of the GNU General Public License as published by 5 the Free Software Foundation; either version 3 of the License, or 6 (at your option) any later version. 7 8 This program is distributed in the hope that it will be useful, 9 but WITHOUT ANY WARRANTY; without even the implied warranty of 10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 GNU General Public License for more details. 12 13 You should have received a copy of the GNU General Public License 14 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 15 16 /* This is only ever run if it is compiled with a new-enough GCC, but 17 we don't want the compilation to fail if compiled by some other 18 compiler. */ 19 #ifdef __GNUC__ 20 #define ATTR __attribute__((always_inline)) 21 #else 22 #define ATTR 23 #endif 24 25 int x, y; 26 volatile int z = 0; 27 volatile int result; 28 29 void bar(void); 30 31 inline ATTR int func1(void) 32 { 33 bar (); 34 return x * y; 35 } 36 37 inline ATTR int func2(void) 38 { 39 return x * func1 (); 40 } 41 42 int main (void) 43 { 44 int val; 45 46 x = 7; 47 y = 8; 48 bar (); 49 50 val = func1 (); 51 result = val; 52 53 val = func2 (); 54 result = val; 55 56 return 0; 57 } 58